Improve ext/trunc patterns on PPC64.

[oota-llvm.git] / lib / Target / PowerPC / PPCRegisterInfo.cpp

diff --git a/lib/Target/PowerPC/PPCRegisterInfo.cpp b/lib/Target/PowerPC/PPCRegisterInfo.cpp
index 899cdd48bd94b2384e2abe96b4e902941707e3d5..ecb8754cbc04398ca5b0ed214b608fb90ff1b429 100644 (file)
--- a/lib/Target/PowerPC/PPCRegisterInfo.cpp
+++ b/lib/Target/PowerPC/PPCRegisterInfo.cpp
@@ -13,10 +13,10 @@
 //===----------------------------------------------------------------------===//
 
 #define DEBUG_TYPE "reginfo"
+#include "PPCRegisterInfo.h"
 #include "PPC.h"
 #include "PPCInstrBuilder.h"
 #include "PPCMachineFunctionInfo.h"
-#include "PPCRegisterInfo.h"
 #include "PPCFrameLowering.h"
 #include "PPCSubtarget.h"
 #include "llvm/CallingConv.h"
@@ -89,10 +89,17 @@ PPCRegisterInfo::PPCRegisterInfo(const PPCSubtarget &ST,
   ImmToIdxMap[PPC::ADDI8] = PPC::ADD8; ImmToIdxMap[PPC::STD_32] = PPC::STDX_32;
 }
 
+bool
+PPCRegisterInfo::trackLivenessAfterRegAlloc(const MachineFunction &MF) const {
+  return requiresRegisterScavenging(MF);
+}
+
+
 /// getPointerRegClass - Return the register class to use to hold pointers.
 /// This is used for addressing modes.
 const TargetRegisterClass *
-PPCRegisterInfo::getPointerRegClass(unsigned Kind) const {
+PPCRegisterInfo::getPointerRegClass(const MachineFunction &MF, unsigned Kind)
+                                                                       const {
   if (Subtarget.isPPC64())
     return &PPC::G8RCRegClass;
   return &PPC::GPRCRegClass;
@@ -554,7 +561,8 @@ PPCRegisterInfo::eliminateFrameIndex(MachineBasicBlock::iterator II,
   // clear can be encoded.  This is extremely uncommon, because normally you
   // only "std" to a stack slot that is at least 4-byte aligned, but it can
   // happen in invalid code.
-  if (isInt<16>(Offset) && (!isIXAddr || (Offset & 3) == 0)) {
+  if (OpC == PPC::DBG_VALUE || // DBG_VALUE is always Reg+Imm
+      (isInt<16>(Offset) && (!isIXAddr || (Offset & 3) == 0))) {
     if (isIXAddr)
       Offset >>= 2;    // The actual encoded value has the low two bits zero.
     MI.getOperand(OffsetOperandNo).ChangeToImmediate(Offset);